tonight's face-off between vice president joe biden and congressman paul ryan is getting a lot more attention than vice presidential debates usually get. the obama campaign is looking to biden to stop the momentum mitt romney has enjoyed since the debate in denver, which governor romney was widely perceived to have won. ryan's job is to keep romney's momentum rolling. today's national gallup poll of likely voters shows governor romney with a slender lead of one point over the president. of course, that's within the margin of error so it's essentially a tie. tonight's debate isality centre college in danville, kentucky. nancy cordes and jan crawford are there. first we'll go to nancy, covering the vice president's campaign. nancy. >> reporter: scorkt the vice president arrived here in kentucky today after self days of intense preparation in his home state of delaware and several people there with him told us the president's weak performance in his own debate didn't so much change the strategy as raise the stakes and thails the vice president is very well aware he needs to have a better night t